Justification:
While populations of this species are stable, the species has a limited range (AOO = 87 km²; it is found in 8 locations) and there is ongoing deterioration in habitat quality throughout this range due to invasion by introduced plants, especially Cinnamomum verum.

This snail species is endemic to the Seychelles. It is found on the islands of Mahé, Therèse, Conception, Silhouette, Praslin, Curieuse, La Digue and Felicite; it has become extinct on the island of St. Anne. Its total area of occupancy (AOO) is 87 km². Most of the populations on the different islands represent different subspecies; the distribution and the area of occupancy (AOO) of each is as follows:

The total population size of this species has been estimated to be 7.2 million individuals, though some subspecies are much more abundant than others. The numbers of individuals of each subspecies is estimated to be:

This snail is a terrestrial lowland forest species, found in leaf litter, and is one of the most important detritivores in the forest ecosystem. It does not lay eggs, but rather gives birth to live young.

It is threatened on Mahé and Praslin islands by habitat degradation caused by invasive exotic plants, especially Cinnamomum verum, and predation by the Common Tenrec (Tenrec ecaudatus), a small mammal that was introduced to the Seychelles. Small-scale farming and wood plantations have threatened this snail's habitat in the past.